@online{NXP:Classic1K,
  organization = {NXP},
  title = {MIFARE Classic 1K - Mainstream contactless smart card IC 
  for fast and easy solution development},
  date = {2011-05-02},
  url = {http://www.nxp.com/documents/data_sheet/MF1S50YYX.pdf}
}

@online{Nonan:SimpleNFC,
  author = {Nicolas Kruse},
  title = {Simple NFC},
  date = {2013-11-12},
  url = {http://blog.nonan.net/2013/11/simple-nfc.html}
}